In CPA, there is no risk for the advertiser, as they only pay when a consumer completes an agreed transaction. Recently Greystripe ran a special CPA ad program for mobile app developers, where they charged $0.99 per download, regardless of how many impressions or clicks it took to get the download. For some developers, paying to advertise a new mobile app can sometimes be a risky business.

They may pay for tens of thousands of impressions or thousands of clicks without actually getting any downloads. Greystripe offered a different alternative - they would run the ads, and the developer would just pay a fixed fee of $0.99 each time their app was downloaded. All campaigns in this special reached their download targets as Greystripe generated more than 60,000 downloads at 99 cents per download.

Optimisez vos campagnes pour mobile avec Google Analytics. Could Apple Actually Beat Google in Mobile Advertising?
The Social Analyst is a weekly column by Mashable Co-Editor Ben Parr, where he digs into social media trends and how they are affecting companies in the space.

On Thursday, Apple will unveil iPhone OS 4.0. It's not the only thing the company is expected to reveal, though. As we wrote last week, Apple is slated to launch its iAd mobile advertising platform, based off of its acquisition of Quattro Wireless in January. If true, the move would place Apple into direct competition with Google, whose acquisition of AdMob is still pending regulatory approval. Online advertising is Google's bread and butter. So does Apple, whose specialty isn't advertising, stand a chance in a duel with the Google juggernaut? Apple Has a Head Start While Google may have the talent and the experience in advertising, Apple has the head start in mobile, which could make all of the difference in this battle.

While very few details have been revealed concerning iAd, there are a few assumptions we can logically make.
AdMob Metrics. Google: the Future of Mobile Advertising? : Sparxoo. What made Google a multi-billion dollar company today will help the search giant pioneer the next revolution in mobile advertising: hyper-relevancy. Google AdWords enabled advertisers to target users with unprecedented precision.

Google’s acquisition of mobile advertising platform, AdMob, signals the next evolution in advertising. Google will deliver advertising content consumers actually want — making it lucrative for all parties involved. Mobile adds a new layer of relevancy to target users with even greater accuracy: location. While Google’s mobile ad platform takes a backseat to Apple today, many experts predict the combination of Google’s ad targeting technology and Android growth positions the search giant to jump in the drivers seat and take the lead in what is projected to be a $3.3 billion dollar market by 2013. Sonya Chawla of Rhythm New Media notes “tons of money is being shifted out of TV and is looking for a new home.” How will Google surpass Apple?